Is CVE-2026-23256 in the CISA KEV catalog?

No. CVE-2026-23256 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-23256?

CVE-2026-23256 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2026-23256?

CVE-2026-23256 has an EPSS score of 0.11% (2th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-23256?

Upgrade linux on debian 11 to 5.10.251-1 or later. Fixes are available for 117 affected products.

CVE & CISA-KEV Catalog

CVE-2026-23256

MEDIUM

5.5

CVSS v3

NVD

Description

In the Linux kernel, the following vulnerability has been resolved: net: liquidio: Fix off-by-one error in VF setup_nic_devices() cleanup In setup_nic_devices(), the initialization loop jumps to the label setup_nic_dev_free on failure. The current cleanup loop while(i--) skip the failing index i, causing a memory leak. Fix this by changing the loop to iterate from the current index i down to 0. Compile tested only. Issue found using code review.

CWE-193

How to fix

Remediation Available

linuxDebian

Fixed in:5.10.251-1CVE-2026-23256

Fixed in:6.1.164-1CVE-2026-23256

Fixed in:6.12.73-1CVE-2026-23256

Fixed in:6.18.10-1CVE-2026-23256

linuxUbuntu

Fixed in:6.8.0-117.117USN-8278-1

linux-awsUbuntu

Fixed in:6.8.0-1055.58USN-8278-1

linux-aws-fipsUbuntu

Fixed in:6.8.0-1055.58+fips1USN-8278-1

linux-azureUbuntu

Fixed in:6.8.0-1056.62USN-8278-2

linux-azure-6.8Ubuntu

Fixed in:6.8.0-1059.65~22.04.1USN-8440-1

linux-azure-fipsUbuntu

Fixed in:6.8.0-1059.65+fips1USN-8393-1

linux-fipsUbuntu

Fixed in:6.8.0-116.116+fips1USN-8296-1

linux-gcpUbuntu

Fixed in:6.8.0-1058.61USN-8278-1

linux-gcp-fipsUbuntu

Fixed in:6.8.0-1058.61+fips1USN-8278-1

linux-gkeUbuntu

Fixed in:6.8.0-1054.60USN-8278-1

linux-gkeopUbuntu

Fixed in:6.8.0-1041.44USN-8278-1

linux-ibmUbuntu

Fixed in:6.8.0-1055.56USN-8278-1

linux-ibm-6.8Ubuntu

Fixed in:6.8.0-1055.56~22.04.1USN-8278-1

linux-image-6.8.0-1024-nvidia-tegraUbuntu

Fixed in:6.8.0-1024.24USN-8296-2

linux-image-6.8.0-1024-nvidia-tegra-rtUbuntu

Fixed in:6.8.0-1024.24USN-8296-2

linux-image-6.8.0-1041-gkeopUbuntu

Fixed in:6.8.0-1041.44USN-8278-1

linux-image-6.8.0-1054-gkeUbuntu

Fixed in:6.8.0-1054.60USN-8278-1

linux-image-6.8.0-1054-gke-64kUbuntu

Fixed in:6.8.0-1054.60USN-8278-1

linux-image-6.8.0-1054-nvidiaUbuntu

Fixed in:6.8.0-1054.57~22.04.1USN-8289-2

Fixed in:6.8.0-1054.57USN-8289-1

linux-image-6.8.0-1054-nvidia-64kUbuntu

Fixed in:6.8.0-1054.57~22.04.1USN-8289-2

Fixed in:6.8.0-1054.57USN-8289-1

linux-image-6.8.0-1054-nvidia-lowlatencyUbuntu

Fixed in:6.8.0-1054.57.1USN-8289-1

linux-image-6.8.0-1054-nvidia-lowlatency-64kUbuntu

Fixed in:6.8.0-1054.57.1USN-8289-1

linux-image-6.8.0-1055-awsUbuntu

Fixed in:6.8.0-1055.58USN-8278-1

linux-image-6.8.0-1055-aws-64kUbuntu

Fixed in:6.8.0-1055.58USN-8278-1

linux-image-6.8.0-1055-aws-fipsUbuntu

Fixed in:6.8.0-1055.58+fips1USN-8278-1

linux-image-6.8.0-1055-ibmUbuntu

Fixed in:6.8.0-1055.56~22.04.1USN-8278-1

Fixed in:6.8.0-1055.56USN-8278-1

linux-image-6.8.0-1056-azureUbuntu

Fixed in:6.8.0-1056.62USN-8278-2

linux-image-6.8.0-1056-raspiUbuntu

Fixed in:6.8.0-1056.60USN-8278-1

linux-image-6.8.0-1058-gcpUbuntu

Fixed in:6.8.0-1058.61USN-8278-1

linux-image-6.8.0-1058-gcp-64kUbuntu

Fixed in:6.8.0-1058.61USN-8278-1

linux-image-6.8.0-1058-gcp-fipsUbuntu

Fixed in:6.8.0-1058.61+fips1USN-8278-1

linux-image-6.8.0-1059-azureUbuntu

Fixed in:6.8.0-1059.65~22.04.1USN-8440-1

linux-image-6.8.0-1059-azure-fipsUbuntu

Fixed in:6.8.0-1059.65+fips1USN-8393-1

linux-image-6.8.0-116-fipsUbuntu

Fixed in:6.8.0-116.116+fips1USN-8296-1

linux-image-6.8.0-117-genericUbuntu

Fixed in:6.8.0-117.117USN-8278-1

linux-image-6.8.0-117-generic-64kUbuntu

Fixed in:6.8.0-117.117USN-8278-1

linux-image-6.8.0-117-lowlatencyUbuntu

Fixed in:6.8.0-117.117.1~22.04.1USN-8278-1

Fixed in:6.8.0-117.117.1USN-8278-1

linux-image-6.8.0-117-lowlatency-64kUbuntu

Fixed in:6.8.0-117.117.1~22.04.1USN-8278-1

Fixed in:6.8.0-117.117.1USN-8278-1

linux-image-6.8.0-2045-raspi-realtimeUbuntu

Fixed in:6.8.0-2045.46USN-8278-1

linux-image-6.8.1-1051-realtimeUbuntu

Fixed in:6.8.1-1051.52~22.04.1USN-8278-1

Fixed in:6.8.1-1051.52USN-8278-1

linux-image-aws-6.8Ubuntu

Fixed in:6.8.0-1055.58USN-8278-1

linux-image-aws-64k-6.8Ubuntu

Fixed in:6.8.0-1055.58USN-8278-1

linux-image-aws-64k-lts-24.04Ubuntu

Fixed in:6.8.0-1055.58USN-8278-1

linux-image-aws-fipsUbuntu

Fixed in:6.8.0-1055.58+fips1USN-8278-1

linux-image-aws-fips-6.8Ubuntu

Fixed in:6.8.0-1055.58+fips1USN-8278-1

linux-image-aws-lts-24.04Ubuntu

Fixed in:6.8.0-1055.58USN-8278-1

linux-image-azureUbuntu

Fixed in:6.8.0-1059.65~22.04.1USN-8440-1

linux-image-azure-6.8Ubuntu

Fixed in:6.8.0-1059.65~22.04.1USN-8440-1

Fixed in:6.8.0-1056.62USN-8278-2

linux-image-azure-fipsUbuntu

Fixed in:6.8.0-1059.65+fips1USN-8393-1

linux-image-azure-fips-6.8Ubuntu

Fixed in:6.8.0-1059.65+fips1USN-8393-1

linux-image-azure-lts-24.04Ubuntu

Fixed in:6.8.0-1056.62USN-8278-2

linux-image-fipsUbuntu

Fixed in:6.8.0-116.116+fips1USN-8296-1

linux-image-fips-6.8Ubuntu

Fixed in:6.8.0-116.116+fips1USN-8296-1

linux-image-gcp-6.8Ubuntu

Fixed in:6.8.0-1058.61USN-8278-1

linux-image-gcp-64k-6.8Ubuntu

Fixed in:6.8.0-1058.61USN-8278-1

linux-image-gcp-64k-lts-24.04Ubuntu

Fixed in:6.8.0-1058.61USN-8278-1

linux-image-gcp-fipsUbuntu

Fixed in:6.8.0-1058.61+fips1USN-8278-1

linux-image-gcp-fips-6.8Ubuntu

Fixed in:6.8.0-1058.61+fips1USN-8278-1

linux-image-gcp-lts-24.04Ubuntu

Fixed in:6.8.0-1058.61USN-8278-1

linux-image-genericUbuntu

Fixed in:6.8.0-117.117USN-8278-1

linux-image-generic-6.8Ubuntu

Fixed in:6.8.0-117.117USN-8278-1

linux-image-generic-64kUbuntu

Fixed in:6.8.0-117.117USN-8278-1

linux-image-generic-64k-6.8Ubuntu

Fixed in:6.8.0-117.117USN-8278-1

linux-image-generic-lpaeUbuntu

Fixed in:6.8.0-117.117USN-8278-1

linux-image-gkeUbuntu

Fixed in:6.8.0-1054.60USN-8278-1

linux-image-gke-6.8Ubuntu

Fixed in:6.8.0-1054.60USN-8278-1

linux-image-gke-64kUbuntu

Fixed in:6.8.0-1054.60USN-8278-1

linux-image-gke-64k-6.8Ubuntu

Fixed in:6.8.0-1054.60USN-8278-1

linux-image-gkeopUbuntu

Fixed in:6.8.0-1041.44USN-8278-1

linux-image-gkeop-6.8Ubuntu

Fixed in:6.8.0-1041.44USN-8278-1

linux-image-ibmUbuntu

Fixed in:6.8.0-1055.56USN-8278-1

linux-image-ibm-6.8Ubuntu

Fixed in:6.8.0-1055.56~22.04.1USN-8278-1

Fixed in:6.8.0-1055.56USN-8278-1

linux-image-ibm-classicUbuntu

Fixed in:6.8.0-1055.56USN-8278-1

linux-image-ibm-lts-24.04Ubuntu

Fixed in:6.8.0-1055.56USN-8278-1

linux-image-intel-iot-realtimeUbuntu

Fixed in:6.8.1-1051.52USN-8278-1

linux-image-intel-iotgUbuntu

Fixed in:6.8.0-117.117USN-8278-1

linux-image-kvmUbuntu

Fixed in:6.8.0-117.117USN-8278-1

linux-image-lowlatencyUbuntu

Fixed in:6.8.0-117.117.1USN-8278-1

linux-image-lowlatency-6.8Ubuntu

Fixed in:6.8.0-117.117.1~22.04.1USN-8278-1

Fixed in:6.8.0-117.117.1USN-8278-1

linux-image-lowlatency-64kUbuntu

Fixed in:6.8.0-117.117.1USN-8278-1

linux-image-lowlatency-64k-6.8Ubuntu

Fixed in:6.8.0-117.117.1~22.04.1USN-8278-1

Fixed in:6.8.0-117.117.1USN-8278-1

linux-image-lowlatency-64k-hwe-22.04Ubuntu

Fixed in:6.8.0-117.117.1~22.04.1USN-8278-1

linux-image-lowlatency-hwe-22.04Ubuntu

Fixed in:6.8.0-117.117.1~22.04.1USN-8278-1

linux-image-nvidiaUbuntu

Fixed in:6.8.0-1054.57USN-8289-1

linux-image-nvidia-6.8Ubuntu

Fixed in:6.8.0-1054.57~22.04.1USN-8289-2

Fixed in:6.8.0-1054.57USN-8289-1

linux-image-nvidia-64kUbuntu

Fixed in:6.8.0-1054.57USN-8289-1

linux-image-nvidia-64k-6.8Ubuntu

Fixed in:6.8.0-1054.57~22.04.1USN-8289-2

Fixed in:6.8.0-1054.57USN-8289-1

linux-image-nvidia-64k-hwe-22.04Ubuntu

Fixed in:6.8.0-1054.57~22.04.1USN-8289-2

linux-image-nvidia-hwe-22.04Ubuntu

Fixed in:6.8.0-1054.57~22.04.1USN-8289-2

linux-image-nvidia-lowlatencyUbuntu

Fixed in:6.8.0-1054.57.1USN-8289-1

linux-image-nvidia-lowlatency-6.8Ubuntu

Fixed in:6.8.0-1054.57.1USN-8289-1

linux-image-nvidia-lowlatency-64kUbuntu

Fixed in:6.8.0-1054.57.1USN-8289-1

linux-image-nvidia-lowlatency-64k-6.8Ubuntu

Fixed in:6.8.0-1054.57.1USN-8289-1

linux-image-nvidia-tegraUbuntu

Fixed in:6.8.0-1024.24USN-8296-2

linux-image-nvidia-tegra-6.8Ubuntu

Fixed in:6.8.0-1024.24USN-8296-2

linux-image-nvidia-tegra-rtUbuntu

Fixed in:6.8.0-1024.24USN-8296-2

linux-image-nvidia-tegra-rt-6.8Ubuntu

Fixed in:6.8.0-1024.24USN-8296-2

linux-image-raspiUbuntu

Fixed in:6.8.0-1056.60USN-8278-1

linux-image-raspi-6.8Ubuntu

Fixed in:6.8.0-1056.60USN-8278-1

linux-image-raspi-realtimeUbuntu

Fixed in:6.8.0-2045.46USN-8278-1

linux-image-raspi-realtime-6.8Ubuntu

Fixed in:6.8.0-2045.46USN-8278-1

linux-image-realtimeUbuntu

Fixed in:6.8.1-1051.52USN-8278-1

linux-image-realtime-6.8.1Ubuntu

Fixed in:6.8.1-1051.52~22.04.1USN-8278-1

Fixed in:6.8.1-1051.52USN-8278-1

linux-image-realtime-hwe-22.04Ubuntu

Fixed in:6.8.1-1051.52~22.04.1USN-8278-1

linux-image-virtualUbuntu

Fixed in:6.8.0-117.117USN-8278-1

linux-image-virtual-6.8Ubuntu

Fixed in:6.8.0-117.117USN-8278-1

linux-lowlatencyUbuntu

Fixed in:6.8.0-117.117.1USN-8278-1

linux-lowlatency-hwe-6.8Ubuntu

Fixed in:6.8.0-117.117.1~22.04.1USN-8278-1

linux-nvidiaUbuntu

Fixed in:6.8.0-1054.57USN-8289-1

linux-nvidia-6.8Ubuntu

Fixed in:6.8.0-1054.57~22.04.1USN-8289-2

linux-nvidia-lowlatencyUbuntu

Fixed in:6.8.0-1054.57.1USN-8289-1

linux-nvidia-tegraUbuntu

Fixed in:6.8.0-1024.24USN-8296-2

linux-raspiUbuntu

Fixed in:6.8.0-1056.60USN-8278-1

linux-raspi-realtimeUbuntu

Fixed in:6.8.0-2045.46USN-8278-1

linux-realtimeUbuntu

Fixed in:6.8.1-1051.52USN-8278-1

linux-realtime-6.8Ubuntu

Fixed in:6.8.1-1051.52~22.04.1USN-8278-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

0.11%probability of exploitation in 30 days

2ndpercentile

Low risk: more likely to be exploited than 2% of all known CVEs.

References

Patch7

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-21.